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Patented Apr. 25, I899. C3. P. CUTTBELL.

MECHANICAL MDVEMENT.

(Application filed Jun. 11, 1899.)

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(N0 Model.)

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INVENTOR GM., 7. 4M

WITNESSES:

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No. 623,886. Patented Apr. 25, I899.

} C. P. COTTBELL.

MECHANICAL MOVEMENT.

- (Application filed In. 11, 1899.) (No Model.) 5 Sheets-Sheet 2.

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5 Sheets-Sheal 3.

Patented Apr. 25, I899. C. P. CUTTBELL.

MECHANICAL MOVEMENT.

(Application filed Jam. 11, 1899.)

(No Model.)

ATTORNEY THE Ncmms vzrzns 00.. mom-nun, WASNINGYON, 0. c

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(No Model.)

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No. 623,886. Patented Apr. 25, I899.

G. P. CUTTRELL.

MECHANICAL MOVEMENT.

(Application filed 3m. 11, 1899.)

5 Sheets-Shoat 5.

(No Model.)

INVENTOR WITNESSES BY JMM ATTORNEY UNKTE TATES CHARLES P. COTTRELL, OF \VESTERLY, Rl-IODE ISLAND, ASSIGNOR TO THE C. B. COTTRELL dz SONS COMPANY, OF JERSEY CITY, NEW JERSEY; STON- INGTON, CONNECTICUT, AND NEYV YORK, N. Y.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 623,886, dated April 25, 1899. Application filed January 11, 1899. Serial No. 701,813. (No model-l To all whom it mag, concern: ticularly for usein connection with the recip- Be it known that 1, CHARLES P. COTTRELL, rocating beds of printing-presses;- but it may a citizen of the United States, and a resident beadvantageously employed in various other of Westerly, in the countyof WVashington and kinds of machines.

5 State of Rhode Island, have invented certain The bed or other body to he reciprocated new and useful Improvements in Mechanical is moved longitudinally back and forth, as Movements, of which the following isa speciheretofore, by means of two longitudinallyfication. arranged toothed racks connected to the bed My invention relates to that class of meor reciprocating part and aconstantly-ret-olv- IO chanical movements set forth in the Letters ing toothed pinion which alternately engages 7 Patent No. 471,786, granted March 29, 1892, with said racks. Means are provided for to Calvert B. Cottrell, and has for its main properly guiding the pinion into and out of object to substitute for the forked lever and engagement with said racks at the ends of its actuating parts shown and described in the strokes of the bed or reciprocating mem- I 5 said patent differentand more desirable mechber. Means are also provided for starting anism for performing the functions of said the bed in each direction with a slow moveforked lever. The various parts comprising ment and gradually accelerating its speed this mechanism, their arrangement, and their until the revolving pinion engages with one mode of operation will be hereinafter fully or the other of the said racks and moves the 20 described. My invention therefore consists bed at full speed and for also gradually rein this substituted mechanism andin its comtarding the bed during the completion of its bination in whole and in part with other destroke in each direction and just prior to its vices and mechanisms, all as will be hereinstoppage and restarting it again in the oppoafter m ore particularly set forth,and specified site direction.

25 in the appended claims. For the purpose of this case 1 may repre- In the accompanying drawings, Figure 1 is sent the reciprocating bed of a printing-press, an end view of a mechanical movement emand this may be mounted for its movement bodying my improvements. Fig. 2 is a horiin any, suitable way in the framing 2 of the zontal section of the same on the line 20 w of machine. To the under side of the bed are 0 Fig. 1. Fig. 3 is a longitudinal vertical secrigidly connected two vertically-arranged tion ofthe whole machine, taken on thelinemw straight racks 3, disposed longitudinally of ofFig. 2. Fig. dis an enlarged plan view of the the bed and in this case in the same vertical newly-devisedmechanismwith portions of cerplane or one directly above the other and rain of the parts broken away. Fig. 5 is a 'with the teeth of one rack facing those of the 3 5 similar view, but with the moving parts in other. These racks are preferably attached different positions. Fig. 6 is a vertical secby screws to an open frame or casting which tion taken at the line 3 y of Fig. l. Fig. 7 is rigidly attached to the bed andin the form is a similar section taken at the line y z. of shown consists of two longitudinal bars 4, one Fig. 5. Figs. 8, 9, 10, 11, and 12 are detail over the other, united at their ends by inte- 0 sectional views in plan, on a smaller scale, gral curved bars or members 5 and vertical to illustrate the operations of the various bars 6. At each end of the rack-frame and 0 parts at different times or in different posiattached to the curved member is a semicir- -tions of the rack-frame or moving bed, and cular or curved rack 7. which will be hereinafter more specifically 8 designates the driving gear or pinion,

4 5 referred to. which alternately engages the straight racks In the various views the same part will be 3, and 9 designates a smaller gear or pinion 5 found designated by the same numeral of mounted rigidly and cccentrically of the axis reference. of rotation of the gear 8, but arranged to turn The invention has been designed more partherewith and mesh with the curved end rack 7 when the gear 8 is leaving one straight rack and while it starts to reengage the other straight rack and during the time the gear 8 is wholly out of mesh with both straight racks.

The driving-gear 8 has a slight rising-andfalling motion to disengage from one rack and to engage the other, and hence the diameter of this gear is less than the distance apart of the oppositely-disposed racks. In order to afford the gearing the necessary upandlown movements, its rotating shaft 10 is mounted eccentrically in a bushing 11, fitted in an eye or hearing at the upper end of a standard or bracket 12, secured to the base of the frame. To the outer end of said bushing is connected a crank-arm 13, to which is jointed at it one end of a link or pitman 15, whose opposite end is slotted or provided with an open frame 16, that embraces and slides upon a square block 17, mounted loosely on a shaft 18, ex tending transversely of the machine and mounted in suitable bearings.

Between the ends of the pitman or link is attached a roller 19, that works in a grooved cam 20, formed in the face of a disk or wheel 21, fast on the shaft 1 8. This cam is so shaped and proportioned as that at the proper times it moves the pitman longitudinally and causes it, through the crank-arm, to turn the bushing, and thereby elevate or lower the shaft 10 and the driving-gear 8, attached thereto, so as to cause said gear while it is rotating to move bodily from one straight rack toward the other, and which movement takes place when one of said straight racks has run out of mesh with said gear atnear the end of its stroke and while the reversing of the bed is occurring under the action and control of the mechanism to be hereinafter described. Just before the driven rack and the gear 8 part company the guiding gear or pinion f) strikes into mesh with one of the curved racks and continues its engagement therewith until the main gear 8 has been moved up or down to come properly into mesh with the other straight rack, which it then proceeds to drive at full speed.

The power may be applied at the shaft 22, which, as shown, is provided with the usual pulleys 23, and on the inner end of said shaft, which is mounted in a bearing 24: in the side frame and in a bearing 25, extended laterally from the bracket 12, is provided a toothed gear-wheel 2U, that constantly meshes with and drives the gear 8, which turns always in the same direction during the operation of the machine. The cam-shaft 18 is provided with alarge spur-gear27, whichis driven by a pinion 28 on the power-shaft The mechanism thus far described comprises the means for giving the bed its main movements back and forth and means for guiding the driving-gear into and out of engagement with the straight racks with an easy and certain action, thus avoiding any shocks or thumping action, which might othcrwise occur when the driving-gear strikes into fresh engagement with either of the straight racks immediately following the actual reversing operation, to be presently described.

fhile I have shown the straight racks as located in the same vertical plane and arranged to have the driving-gear swing up and down to alternately engage said racks, this of course is not essential so far as the main features of my improvement are concerned, and in lieu of such a construction and mode of: operation the straight racks may be offset and the driving-pinion may engage them alternately by a lateral sliding movement, as shown and described in the Cottrell patent aforesaid, and although I have shown the curved end racks as semicircular and continuous and as coopcrating with a continuous pinion or guiding wheel it will also be understood that as far as my invention is concerned these end racks, forming continuations of the main racks, may be made in the form of sections or segments not continuous, and the guiding-gear which coacts therewith may be only a partial pinion or segments of gears, as also shown and described in the said Cottrell patent.

I shall now describe the reversing mechanism proper, by which the bed is gradually retarded at near the end of its stroke in either direction and gradually accelerated after the end of the stroke has been reached and until the main driving-gear again takes hold of one of the main racks and drives the bed for the major part of its stroke under the full speed of said gear.

Each of the bars 6 on the rack-frame carries or is provided with a vertical bearer or cross-head 2.),with which cooperates a crankpin or stud 30, provided with an antifrictionroller 31, that traverses the face of said bearer and operates on one half thereof gradually to check the speed of the bed and on the other half gradually to accelerate the speed of the same. This crank-pin is fixed at the outer end of a crank-arm 32, that is secured by screws 33 on the face of the fixed guiding pinion or gear 9 and radially of the axis thereof. The center of said crank-pin is coincident with the pitch-eircle of the said pinion, which pinion is one-half the diameter of the driving-gear and is so attached thereto as that its pitch-circle passes through the plane of the axis of the gear 8 and through the pitch-line of the teeth of said gear. The pitch-circle of the guiding-gear 9 and the center of the crank-roll pass through the centers from which the curved racks 7 are formed, or, in other Words, as is shown in Fig. 3, the pitch-lines of the gears S and 9 and the centers of the crank-roll and curved rack all coineide.

As far as the main features of my invention are concerned the bearers 29 may be curved and concentric with the curved racks, with their treads or faces arranged to coincide with the pitch-lines of the teeth of said racks, and the crank-roller in order to cooperate therewith may be fixed axially of the guiding-gear 9, as shown and described in prior patents in this art; but I prefer to use the straight vertical bearers and the crankroll arranged, as shown, to work in conjunction therewith.

At each end of the rack-frame is a downwardly-projecting stud 34, provided, preferably, with an antifriction-roller which during the time of reversal of the bed is to coact with a cam-like device 35, which may be attached to or formed of a piece with a plate or disk 36, which is preferably horizontally arranged. The cam 35 is curved or crescentshaped and mounted on the upper side of said disk, and the cam edge or working face of the device is preferably concentric with the center of said disk.

On the under side of the disk is attached by two downwardly-passing screws 37 a gearwheel 38, at whose center is a downwardlyprojecting hub or pivot 39, that is seated in a hole or bearing 40 in a crank-arm 41, that is attached by screws 42 to a pinion 43. The gear-wheel 38 is preferably attached to the disk eccentrically of its center and of the center of the cam face or edge, and hence the hub or pivot 39, which is arranged centrally of said disk, is eccentrically arranged with respect to the center of the disk and of the can].

The pinion 43 is loosely mounted upon a shouldered stud or bolt 44, that is threaded at its lower end and attached, eccentrically, by means of a nut 45 to a crank plate or disk 46, provided at its edge with acircular series of downwardly and outwardly projecting gear-teeth 47, and the said pinion 43'is thereby adapted to rotate in engagement with the teeth 48, formed circularlyon the inner edge of a ring 49, that is supported at one side upon a short bracket 50, mounted on a horizontal arm or bracket 51, and at its opposite side upon another short bracket 52, mounted on the vertical standard 12.

Upon the outer side of the fixed ring 49 and above the plane thereof is mounted a short straight rack 53, which engages at all times the eccentrically-mounted gear or pinion 38 on the under side of the cam disk or plate 36.

The hub 54 of the toothed crank-plate or bevel-gear 46 is attached, by a spline or feather 55, to the upper end of a vertical shaft 56, that is stepped in a bearing 57 at the bottom of the framework and is provided with an intermediate bearing 53 in the cross-arm or bracket 51, a collar 59 being attached to said shaft on the under side of said bracket 51 to prevent it from moving upwardly. The said bevel-gear 46 is driven by a toothed bevelgear 60, fixed at the inner end of a horizontal shaft 61, which has a bearing at its outer end in the main frame and, passing through the vertical bracket 12, has an inner bearing at the inner end of the cross-arm or bracket 51, which at this end is attached to the vertical standard 12 and at its outer end to the side frame of the machine. The said crossarm 51 at its inner end is forked or formed with two branches 62, that pass around the bevel-gear 60 on opposite sides and unite with the shaft-bearing portion of the arm, which at this point has a downwardly-projecting lug 51, that is attached to the vertical standard 12 by horizontally-disposed screws.

The shaft 61, hearing the bevel drivinggear 60, is provided at its outer end with a toothed gear 63, that engages with an idle or intermediate gear 64, mounted on a stud or pivot in the side frame, and the said intermediate gear meshes with the large spurgear 27, which is driven by the pinion 28 on the power-shaft. Thus by the power through the gear 28, gear 27, intermediate gear 64, and the gear 63 the shaft 61 is rotated and through the gears 60 and teeth 47 the bevelgear 46 is rotated and the pinion 43, mounted thereon or connected thereto,is caused to turn therewith and travel around the fixed ring 49. The crank-arm 41, being attached to the pinion 43, moves therewith, and the gear 38, pivoted on orin said crank-arm, moves bodily with the latter, and by reason of its engage ment with the short rack 53 the said gear 38, and hence the disk 36 and cam 35, rigidly connected thereto, are caused to oscillate about the pivot 39 while said bodily movement of the gear 38 is occurring. The pitch diameter of the pinion 43 is equal to one-half the pitch diameter of the teeth on the inside of the fixed ring 49, and the center of the pivot 39 is on the pitch-circle of the pinion 43, andin consequence of the construction, proportion, and arrangement of parts the pivot 39 is caused to travel always in a straight line parallel with the motion of the bed or on a line represented by the section-lines y y and 'y 2, Figs. 4 and 5, while the pinion is traveling around in gear with thefixed ring 49 and while the crank-arm is turning around with said pinion. The pinion 43 turns independently on its own axis while it is being carried around bodily with the bevel-gear 46, and likewise the gear 38 turns independently on its own pivot while it is being carried along bodily by the pinion 43 or the crank-arm thereon; but while the gear 38 turns on its true center the disk 36 and the cam 35 do not turn on their own centers, but on the center or axis of rotation of the gear 38 and which is eccentric to the cam center, and this eccentric movement of the cam is utilized for the purpose of causing the bed positively to make its full stroke in case it would otherwise be unable to do so by reason of too little momentum or too much spring resistance to the bed.

It will be understood that in this class of printing-presses the bed is provided with airsprings or the like, which operate to reduce the momentum of the bed during the slowingdown movements and which subsequentlyreact to start the bed in the reverse direction. It sometimes happens that there is too much resistance in the springs, and hence the momentum is all taken out of the bed before it has completed its full stroke. \Vhen this occurs, the cam comes around behind the depending stud-roll on the bed-frame and forces or pushes the bed along to the full end of its stroke. If the bed be nicely balanced as to momentum and spring resistance, the cam will act then simply to hold the vertical bearer up against the crank-roll 31 during the slowing down of the bed and during the restarting of the bed in the opposite direction. In other words, when the cam is acting on the depending bed-roll 3% the crank-roll 31 is aeting on the vertical bearer, so that the bed practically is held firmly between the cam and the crank-roll during the entire reversing operation, the cam working on the outer side of the bed, so to speak, and the crank-roller on the inner side, so that there is a sort of grasping action upon the bed by the aforesaid devices, which prevents any lost motion or excessive motion of the bed. The gear 38, that is reciprocated back and forth by the crank ll, makes only about a half a revolution, and hence the said gear need not be a full circular gear, and likewise the cam disk or plate that is carried by said gear may be cut away without affecting its operation.

The length of the cam is slightly greater than a semicircle, and one-half of this cam acts upon the depending stud-roll on one end of the bed-frame and the other half of said cam acts upon the other end of said depending stud-roll at the opposite end of the bedframe.

I shall now describe the operation of the reversing devices, referring more particularly to Figs. 2 and 3 and the series of diagrammatic views at Figs. 8 to 12, inclusive.

Figs. 2, 3, and 8 show the mechanism in corresponding positions, at which time the bed has completed its full travel toward the left and has been stopped and is about to be started in the reverse direction. As will be seen at Fig. 3, the main driving-gear Sis entirely out of mesh with both the longitudinal racks 8, the guiding-pinion f) is in a position centrally of the curved rack '7, which it is traversing, and the crank-roll 31 is on the dead-point or centrally of the vertical bearer 29. The bed has reached the limit of its movement toward the left and is about to be started toward the right by the crank-roll, which at this time is rotating upwardly and about the axis 10 of the main driving-gear 8. Immediately the crank-roll starts above the horizontal position shown at Fig. its pressure upon the vertical bearer causes the bed to begin its movement toward the right, and this movement is gradually increased as the crank approaches a vertical position. At about the time the crank has arrived in an upright position the main driving-gear S, which had been gradually lifting bodily, strikes into gear with the upper main rack 3 and takes the bed at full speed, whereupon the crankroll leaves the vertical bearer and the guiding-pinion leaves the curved guiding-rack. The said crank and pinion then make one revolution with the main driving-gear, and just before the main driving-gear runs out of mesh with the upper rack at the left-hand end the guiding-pinion runs into mesh with the left-hand curved rack, and the vertical bearer is simultaneously brought up against the crank-roll, which at this time is near a vertical line passing through the axis of the driving-gear, and the further movement of the bed toward the right islimited to the speed of the crank-roller, which soon passes the verticalline and then descends along the vertical bearer as the latter advances by the momentum of the bed until the dead-point or horizontal center of the axis of rotation of the crank is reached, the crank-roll thus operating at this time to gradually slow down the speed of the bed and finally wholly to arrest its movement at such dead-point. The travel of the crankroll (beyond the dead-point) on the face of the bearer operates to start the bed again in the opposite direction toward the left and gradually to increase its speed. Just before the descending crank-roller reaches the aforesaid vertical line the main driving-gear comes into mesh with the lower straight rack 3, the guiding-pinion running in mesh with the lefthand curved rack operating properly to guide the main gear into mesh with the straight rack, as before explained. Thereafter the gear drives the bed toward the left.

At Fig. 8 the crank is represented as in its horizontal position and as about to move the bed toward the right or to the position shown at Fig. 9, where the crank has now arrived at a vertical position and at which time the main driving-gear is engaged with the upper straight rack.

At Fig. 10 the crank is out of operative e11- gagement with the bearer, and the bed is moving at full speed toward the right by reason of the engagement between the gear 8 and the rack At Fig. 11 the movement of the bed to the right by the said gear 8 and rack 3 has ceased and the bearer has come up against the ascending crank-roll, which is substantially in a vertical position and controls the speed of the bed for the remainder of its movement to the right.

At Fig. 12 the movement of the bed to the right is shown as having been completed, and the bed is about to be started toward the left by the descending crank-roll acting on the lower half of the vertical bearer, and, as before explained, just before or at abontthe time the crank-roll leaves the bearer the main gear 8 runs into mesh with the lower rack and the bed is continued at full speed toward the left.

During the time the crank-roll is operating gradually to reverse the movement of the bed the vertical bearer, and hence the bed, is held up against the crank-roll or prevented from ICO getting away from the same-by the rotating cam 35 and bed-roll 34.

Referring to Fig. 8, it will be observed that at the time the crank-roll 31 is about to ascend and move the bed toward the right the bed-roll 34 is at about the center or deadpoint of the cam 35. During the ascent of the crank-rollerto the vertical position shown at Fig. 9 the cam 35, revolving in the direction of the arrow, makes a quarter of a revolution or arrives at the position shown at Fig. 9, and during this movement of the cam from the position shown at Fig. 8 to that shown at Fig. 9 the bed-roll 34 travels along in contact with the inner face or edge of the cam and is controlled thereby, the movements of the cam being properly timed relatively to the movements of the crank, so that while the crankroll is acting on the vertical bearer the cam is acting on the bed-roller, thus confining the bed between the crank and the cam. While the crank-roll is in the horizontal position on the bearer and the bed-roll is at a midway position on the cam, as shown at Fig. 8, the pinion 43 and the crank 41 carried thereby are in the positions shown at Fig. 4, and the gear-wheel attached to the cam is at the limit of its movement to the left along the short rack 53, as shown at Fig. 4 and also at Fig. 8. The bevel-gear 46, rotating in the direction of the arrow marked thereon, now causes the pinion 43 to travel in the same direction, and by reason of the engagement of said pinion with the internal toothed ring said pinion is at the same time caused to turn on its own axis and revolve in a direction opposite to that of the bevel-gear 46, the arrow being placed on the pinion to show the direction in which it turns upon its axis. In consequence of this bodily movement of the pinion with the bevel-gear 46 and of the independent rotary movement of said pinion about its own axis the pivot or crank-pin 39 is caused to travel always along the line y y and the line y .2 at Figs. 4 and 5, and when the pinion has moved bodily from the horizontal position of Fig. 4 to the vertical position of Fig. 5 the pivot 39 has traveled from the dotted position shown at Fig. 4 to that shown at Fig. 5, or, in other words, about one-half the length of the rack 53. This rectilinear movement of the pivot 39 causes a bodily movement of the cam 35 in the same direction, and in consequence of the cam-gear 38 meshing with the straight rack 53 the cam is rotated at the.

same time that it is being moved bodily along with the pivot 39. The positions of the parts shown diagrammatically at Figs. 8 and 9 correspond with those shown at Figs. 4 and 5, the cam, however, being omitted from Fig. 5 in order to simplify the view. Thus while the bed-roll is moving from the position shown at Fig. 8 to that shown at Fig. 9 the cam is given a movement of translation as well as a rotary movement, and when the parts have arrived in the position shown at Fig. 9 the cam is ready to part company with the bedroll and to allow it to pass by or out between the ends of the cam, as shown at Fig. 10, at which time the main gear is in mesh with the straight rack 3. When the parts have arrived at the position shown at Fig. 10, the internal pinion 43 has made another quarter of a revolution around the internal toothed ring or has arrived at the horizontal position again on the opposite side of the center of the crank-disk 46, and in consequence of the construction and arrangement the pivot 39 is carried to the end of its travel toward the right, and the continued rotation of the crank-disk and crankpin 43 will cause said pivot 39 to travel back again on the same line or in a direction toward the left, and this movement of the pivot 39 will carry with it the cam 35, and owing to the presence of the cams gear 38 and the rack 53 the cam will rotate in the opposite direction during this return movement of the pivot 39. When the pinion 43 has made threefourths of a revolution around the fixed ring or has come to the position shown at Fig. 11 after turning several times first one way and then the other, the cam comes to the position shown at Fig. 11 and continues to rotate in the direction of the arrow thereat until the position shown at Fig. 12 is reached. While the said pinion 43 is making the aforesaid three-fourths of a revolution around the fixed ring or is moving from the position shown at Fig. 10 to that shown at Fig. 11 the gear 38 has traveled the full length of the rack 53 from left to right and back again toward the right half-way or to the position shown at Fig. 11, and in doing so has of course rotated or oscillated the cam first one way and then the other, and of necessity while the said gear 38 has made this movement for the whole length of the rack toward the left and back again for one-half its length the pivot 39, controlled by the pinion 43 and its crank 41, has made a like excursion along the line y y of Fig. 4, and meanwhile the bed has traveled from the position shown at Fig. 10 to that shown at Fig. 11, and the bed-roller 34, at the left-hand end of the bed, is now in position to coact with the cam 35 or that half of the cam on the opposite side of the half which acts upon the right-hand bed-roll. During the rotation of the cam in the direction of the arrow at Fig. 11 it is adapted to run in contact with the bed-roll 34 at the left-hand end of the bed and hold the bed properly against the descending crank-roll. When the crank and pinion 43 have arrived in the horizontal position indicated at Fig. 12, the central portion of the cam has arrived at the bed-roll and the motion of the cam is reversed or the cam begins to run in the direction of the arrow shown at Fig. 12, at which time the crank-roll is running down upon the lower half of the vertical bearer and is moving the bed toward the left. During this time the cam runs in contact with the bed-roll, and hence keeps the bearer up against thecrank-roll and coacts in conjunction therewith to control this part of the m ovement of the bed just as the other half of the cam does during the starting of the bed to the right, as explained with reference to Figs. 8 and fl.

Referring again to Fig. 8, the cam is in the position of holding the bed relatively to the crank-roll during the initial reversing of the bed by the action of the crank-roll; but before the cam arrived in this position it had a motion in the opposite direction, and during the last part. of the movement of the bed toward the left the cam followed up behind the bed-roll just as the cam follows up behind the bed-roll during the final part of the movement to the right,as illustrated at Fig. l 1.

At Fig. 8, it will be understood, the bed is shown at the ext reme limit of its stroke toward the left and as about to start again toward the right, at which time the cam also starts to reverse or move in the direction of the arrow at Fig. 8 to control the movement of the bed and finally to let the bed roll out. Thus it will be seen that one half of the cam acts on the right-hand bed-roll and the other half on the left-hand bed-roll; also, that during the final or slowing-down movement of the bed, after the main gear Shas left the straight rack andthe crankis in action, the cam turns in the proper direction to follow the bed in this final retarded movement until the bed is arrested, and then when the crank-roll starts to reverse the bed at an accelerated speed the cam is reversed and at a properspeed to permit this reversal and yet hold the bed in proper relation to the crank-roll. Depending upon the momentum of the bed in the slowing-down movement of the bed the cam will have a variable action-that is to say, if there be too much momentum or too little spring resistance the cam will simply run aroundin contact with the bed-roll; but if there be too little momentum or too much spring resistance the cam will then perform the duty of forcing the bed along to the final portion of its intended stroke; but in the restarting of the bed in the opposite direction the said cam will always control the movement of the bed or confine it to the action of the crank,whether there be too much spring resistance or too little.

Inasmuch as one half of the cam device acts only at one end of the bed and the other half at the opposite end, it will be understood, of course, that in place of the unitary device shown and described there may be two separate cams without departing from the principle of construction involved. \Vhile I have shown the cam or cams as workingin a horizontal position, it or they may of course be arranged to work in a vertical position, the driving or actuating parts being suitably mounted for that purpose and the bed-rolls instead of depending from the bed being arranged to stand out laterally or horizontally therefrom.

Various other changes in detail construction and in the arrangement of the parts of the mechanism additional to those hereinbefore pointed out may be made without at the same time departing from the gist of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination of a bed ormember, means for reciproeatin g the same, means for reversing the same, a bodily-movable and oscillatory cam, and a part on or connected with the bed or member coacting with said cam.

2. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the same, and bodily-movable and oscillatory cams coacting with parts on or connected with said bed or member.

The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, and a reciprocatory and oscillatory cam adapted to cooperate with the bed or member and with the reversing mechanism in the slowing down and restarting of the bed or member.

4. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, and a reciprocatory and oscillatory eccentricallymounted cam.

5. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a gear attached thereto, a rack for rotating said gear and cam, and means for reciprocating said gear and cam.

G. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a gear attached eccentrically thereto, a rack for rotating said gear and cam, and means for reciprocating said gear and cam.

7. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a gear attached thereto, a straight rack for rotating the same, a crank connected to said cam, a fixed internally-toothed ring, a pinion adapted to traverse the same and attached to said crank, whereby the crank-pin is caused to travel in a right line substantially parallel with the said straight rack and effect a bodily to-and-fro movement of the gear and cam.

8. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a gear set eccentrieally to the same, a straight rack, a crank connected to said cam, a crankplate, a pinion set eccentrically thereon and connected to said crank, a fixed internallytoothed ring, and means for rotating said crank-plate, whereby the pinion is caused to travel around said internally-toothed ring and the crank-pin to traverse a right line substantially parallel with the motion of the bed and thereby to effect a reciprocatory movement of the said cam, during which, by means of the said gear and the said straight rack, the said cam is rotated first in one direction and then in the opposite direction.

9. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a gear attached thereto, a straight rack, a toothed ring, a crank-plate, a pinion mounted loosely and eccentrically thereon, acrank attached to said pinion and having its pin e011- nected to said cam, and gears for rotating said crank-plate and pinion.

10; The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a cam, a cam-disk, a gear set eccentrically to said cam and pivotally connected to a crank, a pinion pivotally mounted on a crank-plate and eccentrically of the axis of rotation thereof, a fixed internally-toothed ring for said pinion to traverse, a spindle upon which said crankplate is mounted, a counter-shaft, bevel-gearing between the spindle and the countershaft, and suitable driving mechanism.

11. The combination of a bed or member, means for reciprocating the same, a reversing mechanism comprising essentially a bearer on the bed or member and a revolving crank, a projection on the bed, a cam, means for moving said cam bodily with the bed and in contact with said projection during the slowing down of the bed by the crank and also during the restarting ot' the bed by the crank, and means for rotating said cam first in one direction and then in the other during the said back-and-forth movement of the cam.

12. The combination of a bed or member, means for reciprocating the same, a reversing mechanism comprising essentially a bearer on the bed or memberand a revolving crank, a projection on the bed or member, a cam for coacting with said projection during the time at which the crank and bearer are coacting, means for moving said cam bodily back and forth in a line substantially parallel with the movement of the bed, and a rack and pinion for oscillating said cam.

13. The combination of a bed or member, means for reciprocating the same, a reversing mechanism comprising essentially a bearer 'on the-bed or member and a revolving crank,

a cam adapted to coact with a part on or connected to said bed or member, means for oscillating said cam, and means for moving the same bodily back and forth substantially par allel with the bed comprisinga fixed toothed ring, a pinion mounted on a revolving crank and traversing said rack, and a crank con nected to said pinion and to the said cam.

14. The combination of a bed or member, means for reciprocating the same, a reversing mechanism comprising essentially a bearer on the bed or memberand arevolving crank, a cam, a straight rack and pinion for rotating said cam, a fixed toothed ring, a pinion pivotally mounted eccentrically on a revolving crank, and a second crank attached to said pinion and to the cam for reciprocating the cam during the time the crank and bearer are coacting.

15. The combination of a bed or member having oppositely-arranged driving-racks, a driving-gear adapted to cooperate alternately with said racks to cause the bed to move first one way and then the other,a revolving crank, a bearer on the bed or member adapted to cooperate with said crank, and a reciprocatory and oscillatory cam adapted to cooperate with said bed or member at the same time the crank and bearer are cooperating and while the drivinggear is disengaging from one straight rack and moving to engage the other.

1'6. In a mechanical movement, the combination of a cam, a gear attached thereto, a rack for said gear, a crank connected to said gear and cam, a pinion upon which said crank is mounted, a revolving crank upon which said pinion is mounted loosely and eccentrically, and a fixed toothed ring for said pinion to traverse, whereby the cam is adapted to be reciprocated and also oscillated.

Signed at Stonington, in the county of New London and State of Connecticut, this 5th day of January, A. D. 1899.

CHARLES P. COTTRELL.

VVit-nesses:

ARTHUR M. COTTRELL, A. R. STILLMAN. 

